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Database Systems 6th Edition by Ramez Elmasri, Shamkant B. Navathe
النسخة 6الرقم المعياري الدولي: 0136086209Database Systems 6th Edition by Ramez Elmasri, Shamkant B. Navathe
النسخة 6الرقم المعياري الدولي: 0136086209 تمرين 9
Consider the following relations for a database that keeps track of business trips of salespersons in a sales office:
SALESPERSON (SSN, Name, Start_Year, Dept_No)
TRIP (SSN, From_City, To_City, Departure_Date, Return_Date, Trip_ID)
EXPENSE (Trip_ID, Account#, Amount)
Specify the foreign keys for this schema, stating any assumptions you make.
SALESPERSON (SSN, Name, Start_Year, Dept_No)
TRIP (SSN, From_City, To_City, Departure_Date, Return_Date, Trip_ID)
EXPENSE (Trip_ID, Account#, Amount)
Specify the foreign keys for this schema, stating any assumptions you make.
التوضيح
موثّق
موثّق
The schema of this question has the foll...
Database Systems 6th Edition by Ramez Elmasri, Shamkant B. Navathe
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